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KVM: pit: Do not check pending pit timer in vcpu thread

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Pit interrupt injection was done by workqueue, so no need to check
pending pit timer in vcpu thread which could lead unnecessary
unblocking of vcpu.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Jason Wang 2010-08-27 17:15:06 +08:00 committed by Avi Kivity
parent 989044ee0f
commit 23e7a7944f
2 changed files with 1 additions and 15 deletions
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9
arch/x86/kvm/i8254.c
View file

@ -232,15 +232,6 @@ static void pit_latch_status(struct kvm *kvm, int channel)
}
}
int pit_has_pending_timer(struct kvm_vcpu *vcpu)
{
struct kvm_pit *pit = vcpu->kvm->arch.vpit;
if (pit && kvm_vcpu_is_bsp(vcpu) && pit->pit_state.irq_ack)
return atomic_read(&pit->pit_state.pit_timer.pending);
return 0;
}
static void kvm_pit_ack_irq(struct kvm_irq_ack_notifier *kian)
{
struct kvm_kpit_state *ps = container_of(kian, struct kvm_kpit_state,

7
arch/x86/kvm/irq.c
View file

@ -33,12 +33,7 @@
*/
int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
{
int ret;
ret = pit_has_pending_timer(vcpu);
ret |= apic_has_pending_timer(vcpu);
return ret;
return apic_has_pending_timer(vcpu);
}
EXPORT_SYMBOL(kvm_cpu_has_pending_timer);